nested tables

inspect.lua

@@ -7,32 +7,44 @@
 
 -- public function
 
-local bufferMethods = {
+local Buffer = {}
-  add = function(self, ...)
+
+function Buffer:new()
+  return setmetatable( { data = {} }, { 
+    __index = Buffer,
+    __tostring = function(instance) return table.concat(instance.data) end
+  } )
+end
+
+function Buffer:add(...)
   local args = {...}
   for i=1, #args do
     table.insert(self.data, tostring(args[i]))
   end
   return self
 end
-}
+
+function Buffer:addValue(v)
+  local tv = type(v)
+  if tv == 'table' then
+    self:add('{')
+    for i=1, #v do
+      if i > 1 then self:add(', ') end
+      self:addValue(v[i])
+    end
+    self:add('}')
+  else
+    self:add(tostring(v))
+  end
+  return self
+end
 
 local function newBuffer()
-  return setmetatable( { data = {} }, { 
+
-    __index = bufferMethods,
-    __tostring = function(self) return table.concat(self.data) end
-  } )
 end
 
 local function inspect(t)
-  local buffer = newBuffer()
+  return tostring(Buffer:new():addValue(t))
-  buffer:add('{')
-  for i=1, #t do
-    if i > 1 then buffer:add(', ') end
-    buffer:add(tostring(t[i]))
-  end
-  buffer:add('}')
-  return tostring(buffer)
 end
 
 return inspect

spec/inspect_spec.lua

@@ -2,8 +2,18 @@ local inspect = require 'inspect'
 
 context( 'inspect', function()
 
+  test('Should work with numbers', function()
+    assert_equal(inspect(1), "1")
+    assert_equal(inspect(1.5), "1.5")
+    assert_equal(inspect(-3.14), "-3.14")
+  end)
+
   test('Should work with simple array-like tables', function()
     assert_equal(inspect({1,2,3}), "{1, 2, 3}" )
   end)
 
+  test('Should work with nested arrays', function()
+    assert_equal(inspect({1,2,3, {4,5}, 6}), "{1, 2, 3, {4, 5}, 6}" )
+  end)
+
 end)